Pumice is the only rock that floats on water.
14
A portion of the water you drink has already been drunk by someone else, maybe several times over.
170
By peeing in the shower, you can save 1,157 gallons of water a year.
31
The Kangaroo Rat can last longer without water than a camel.
233
If you get water flowing fast enough, it can cut metal.
354
Sound travels about 4 times faster in water than in air.
408
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
The water of the Antarctica is so cold that nothing can rot there.
335